Game Commands

F1 - Select idle worker
Alt-G - Ping the minimap.
Alt-T - Toggle terrain on/off on the minimap.
Alt-F - Toggle minimap unit color. (Toggles between units displaying team color or between colors for player, allied and enemy.)

Unit Commands

A - Scan Move (available to units without an attack, it approximates the attack move command).

Unit Production

Protoss

Nexus :

E - Probe
M - Mothership

Gateway :

Z - Zealot
S - Stalker
E - Sentry
D - Dark templar
T - High templar
R - Archon

Robotics facility :

A - Warp prism
B - Observer
I - Immortal
C - Colossus

Stargate :

X - Phoenix
V - Void ray
C - Carrier

Terran

Command center :

S - SCV

Barracks :

A - Marine
D - Marauder
R - Reaper
G - Ghost

Factory :

E - Hellion
S - Siege tank
T - Thor

Starport :

V - Viking
D - Medivac dropship
E - Banshee
R - Raven
B - Battlecruiser

Zerg

D - Drone
V - Overlord
V - Overseer
Z - Zergling
E - Baneling
Q - Queen
R - Roach
H - Hydralisk
F - Infestor
T - Mutalisk
C - Corruptor
B - Brood lord
U - Ultralisk

Building Production

Protoss

N - Nexus
E - Pylon
A - Assimilator
G - Gateway
F - Forge
C - Photon cannon
Y - Cybernetics core
C - Twilight council
D - Dark shrine
T - Templar archives
S - Stargate
F - Fleet beacon
R - Robotics facility
B - Robotics bay

Terran

C - Command center
B - Orbital command
P - Planetary fortress
S - Supply depot
R - Refinery
B - Barracks
U - Bunker
G - Ghost academy
E - Engineering bay
T - Missile turret
W - Sensor tower
F - Factory
A - Armory
S - Starport
C - Fusion core

Addons :

C - Reactor
X - Tech lab

Zerg

H - Hatchery
L - Lair
H - Hive
E - Extractor
V - Evolution Chamber
W - Spore crawler
S - Spawning pool
C - Spine crawler
R - Roach warren
B - Baneling nest
I - Infestation pit
H - Hydralisk den
S - Spire

G - Greater spire
N - Nydus network

N - Nydus worm
U - Ultralisk cavern